Mechanical stoker.



No. 755,611.` f PATBNTED MAR. 29, 1904.

' E, n E. R. BRETNEY-. j

MECHANICAL STOKER.

APPLICATION FILED owls, 1903.

A 2 SHEETS-SHEET 1.

N0 MODEL.

PATENTED MAR. 29, 1904.

5E. & H. R. BRETNBY.

MECHANICAL sToKBR.

APPLIOATION FILED 001219, 1903.

2 SHEBTS-BHEET 2.

N0 MDEL.

Bfu'nruur aun HARRY f anniiruiift'or mD'I'AiTrLs,

:JHARRY R. f-Bnugvunr, 'citizens of the United States, residing at Indianapoliain the county fof Marion and State of Indiana, have invented *certa-in neWand l:useful Improvements in Me- Achanical Stokerls; rif-Which the following is a specification.1 -r

' sive mechanical `Stoker for automatically feed- '.ingfuel to furnaces-whereby the fuel maybe pcoked ,at'its `initial,entrance to the iire-bed o'r beldesired,;and gvvhich Willcarry the ashes; i zclinkers,&c.,ifro m `the fire-bed Without per# `inthe furnace for such coking and whereby ax'suchyfuel-may be reduced to an incandescent v tance therefrom kasmaybe desired and by. a. suitably -controlled air blast may at will be `caused"toproduce ahigher'degree of combusient removal, obviating the necessity of ashf pits 'as commonlyfernployed, all as will be 'hereinafter more particularly described and lfl'claimed'. Q r

'STATES i* Patented March' 2e, 19o/i.A

i mEGHANiCAL s'roKER.

-Application filed October 19, 1963` Beit knownthat We, EUGENE BRETNEY and f AThe object of our pre-sent invention is to produce 'a simple, efficient, durable, Vand inexpenconducted from its'initial to any desired point state nearits .initial entrance or at such dis'- tionat different .points of the fire-bed as may rnitting` them to escape therethrough and deliver themfto asuitable receptaclev for conveni Theaceompanying drawings illustrate our invention. Y u Flguregl 1s a .view of a furnace construction,

Fig. 3 is a cross- In .the drawings, lO indicates a suitable hopper for conveying fuel to the furnace. As shovn, said hopper at itsrea-r has a sliding Wall l1, operated to be raised and lowered by a lever structure l2 to regulate the' amount of fuel tobe fed to the furnace. W e provide therein a valve 13, slidably operated to control thefueledischarge for the lower chamber of said hopper. In said hopper We also provide a door 14, which may be slidablyfadjusti Y' `forxningfpart of Letters Patent No. 755,611, dated March 29,1904.

serai no. y1??,5'1'8. (No man.) l

able `or suitably hinged and latched, to the ho'p- 1n the combustion-chamber We provide a receptacle20, of desired design' and dimensions,

having aprons 21 and 22' extending from its up-y y per ends, and secured upon said receptacle r4 box isa perforated cover or top 23. Upon the under side of said perforated top 23 We provide a pluralityT of slidable perforated plates ory valves 24 of sufficient number to underlie the perforated top entirely or only a limited num- Ishifted transversely of the perforated top and the perforations therein caused to register With the perforations in the top or the' imperforate portions thereof caused to obstruct said perforations in the top, said'valve-plates being shown as controlled by suitable handles projecting from the sides of the top plate out throughthe'. lire-wall, Wherebythe valves may be manipulated singly at will, although we do not desire to be understood as limiting ourselvesto such manipulating means, as under some circumstances the valves may be connected in pairs or greater numbers, so that more than onemay be shifted at one operation, or a shifting thereof may be accomp- Plishe by other than the means shown and differently than transversely of the topplate.

Within the receptacle 2O We introduce a blast-pipe 26, adapted to discharge a blast through said receptacle, the blast 'escaping up :through the perforated top 23. `Atthe ends of the receptacle 20 below the aprons We provide driving-shafts 27, 4(driven from any suitable source of power,)'bearing sprocket or other suitable. drlving Wheels 28, Whiclrdrlve the drag-conveyer surrounding per-frame, which door is for the purpose` of the receptacle structure 20, said drag-conveyer -being composed of suitable chains 29 and bars 30, as shown.

In the operation of our apparatus the fuel is delivered through a hopper or other suitable means to the point a, from whence it is IOO v the perforated top at any desired degree of' conveyed by the drag-conveyor lengthwise of i nishes the necessary air-supply to the coked fuel to produce perfect combustion, resulting in the reduction of the fuel to an intense incandescentl or bright lire, thoroughly consuming all the combustible elements of the fuel, so that a minimum of smoke escapes therefrom. As the fuel is conducted across the top or plate bythe drag-conveyer the ashes and incombustible products of the fuel are conveyed over theapron 21, falling to the baseV of the furnace, from whence it is conveyed by the conveyer along said base 3l to the outlet 32,Where it falls into anysuitable receptacle provided therefor.

By the'construction of conveyer-described We are not only enabled to automatically feed fuel to any portion of the fire-surface of the furnace in a very simple manner; but, as will be readily understood by the arrangement of drag-conveyer employed, We are by simplyrevolving the conveyer enabled to thoroughly clean the lire-bed when desired and remove.

the ashes, &c., over the rear portion thereof,

' carrying them beneath the conveyer structure over the base-plate out to near the front end of the furnace in the manner shown, or, as Will also be apparent, we may reverse the movement ofthe conveyer, dumping the ma terial out through the door 14. rlhe blast escaping through the perforated plate 23 prevents ashes or other debris from falling therethrough, the same being conveyed along over the apron to the base of the furnace, as just de scribed. By providing the dampers or valves 2i the escape of blast through the perforated top 23 may be controlled, so that by opening all of the valve-plates to register with the'perforated top plate the blast may escape through the entire surface of thetop, or, for instance,

when We desire to convey the fuel, say, as faras b, to coke the valves to this point will be closed, or in cases Where we do not desire that the blast escape through the entire top ,plate for purposes of slow combustion We may open the valves alternately or at the extreme end orin the middle or any other part, thus prov iding a suitable means for discharging the air-blast at any fdesired point and controlling the location of fast or slow combustion of the fuel at Will. I i

We claim as our inventionl. In a furnace, afuel-burning support ernbodying a box-like receptacle and a perforated top therefor, a 'blast-creating means Within said rreceptacle adapted to discharge an airblast longitudinally therethrough, and an endless drag-conveyer traveling about said receptacle structure, substantially as shown and de-` scribed.

2. 'A receptacle forreceiving an air-blast, a perforated top'to said receptacle, aprons at the ends of said receptacle, driving mechanism positioned at both ends of said receptacle beneath said aprons, and an endless drag-conveyer surrounding said described structure and driven by said driving mechanism, as shown and described. v

3. The combination, in afurnace, of a receptacle embodying a perforated fuel-supporting top, a blast-discharger leading into said receptacle, aprons at the respective ends of said receptacle, driving'mechanism positioned beneath said aprons, a drag-conveyer vsurronndin g said described structure operated by said drivi mechanism, valves in said perforated top` and means foroperating said valves, substantially as shown and described.

4i. In an apparatus of the class described, a blast-receptacleA embodying a fuel-supporting top, a drag-conveyer composed of chains and bars as shown and described traversing the upper' and lower surface of said receptaele,

and means for driving said conveyer, substan# tially as and for the purposes set forth.

5,. In a furnace, a blast-receptacle embodying aprons at either end, a perforated fuel supporting top covering said receptaele,valves connected with said top, driving mechanism at either end of said receptacle beneath' said aprons, a drag-conveyer composed of 'chains and bars surrounding said desc i structure, a base as 31, and a discharge-outlet substantially as shown and described and for the purpose set forth.

In Witness whereof we have hereunto set our hands and seals, at lndianapolis, indiana, this 12th day-of Uetober, A. 1903.

EUGENE BRETNEY. [n s] HARRY R. BRETNEY. [L r s] Witnesses:

' P. L. WALSH.,

M. KEMP.

IOC 

